package com.gitee.fanx.notes.common;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 统一Web响应
 *
 * @author fanx
 */
@RestControllerAdvice
public class WebResponseBodyHandler implements ResponseBodyAdvice<Object> {

	private Logger log = LoggerFactory.getLogger(WebResponseBodyHandler.class);

	@Override
	public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
		ResponseBody responseBody = returnType.getMethod().getAnnotation(ResponseBody.class);
		log.debug("{} @ResponseBody: {}", returnType.getMethod().getName(), (responseBody != null));
		return responseBody == null;
	}

	@Override
	public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
			Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request,
			ServerHttpResponse response) {
		if (body == null) {
			log.debug("{} response null", returnType.getMethod().getName());
			return WebResult.success();
		}
		if (body instanceof WebResult) {
			log.debug("{} response Result: {}", returnType.getMethod().getName(), body);
			return body;
		}
		log.debug("{} response Object: {}", returnType.getMethod().getName(), body);
		return WebResult.success(body);
	}

}